Question

The macronutrient which is an essential component of all organic compounds, yet not obtained by plants from soil is

• A. Nitrogen
• B. Carbon
• C. Phosphorus
• D. Magnesium

Answer 1

Answer: (B)

Carbon

Answer 2

Carbon, oxygen, and hydrogen are known as the basic elementsof a living organism - particularly carbohydrates, proteins, lipids, and nucleic acids.
Carbonis the macronutrient that is an essential component of all organic compounds and is not obtained by plants from the soil. Instead, plantsobtain carbon from carbon dioxide (CO2) in the air through the process of photosynthesis. During photosynthesis, plants convert light energy from the sun into chemical energy stored in the form of organic compounds such as sugars, starches, and cellulose.
Hence, option B) Carbon is the correct answer.